Geochemistry and Petrogenesis of Tertiary Volcanic Rocks of the Eastern Roodbar, Alborz Mountain, North of IranReport as inadecuate




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In the Alborz Mountains of the eastern Roodbar north of Iran, Tertiaryvolcanic rocks have a variety of composition between olivine basalt, basalticandesite, pyroxene andesite and andesite. The presence of different xenolithsand xenocrysts is a MORB source and the other continental crust forthe rocks which are the genesis. Thevariations of Y-Nb vs. Zr-Nb and Rb-Y vs. Nb-Y reveal a crustal contaminationof the magma originated from the MORB source. Geochemical studies representthat the area’s rocks were derived from the 15% melting of a mantle source of MORB type with spinelfacies within a continental environment, which was contaminated by varying degrees of continental crustal rocks.

KEYWORDS

Volcanic Rocks, Tertiary, MORB Source Mantle, Crustal Contamination

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Shafeie, Z. , Ali Arian, M. , Haghnazar, S. and Abedini, M. 2016 Geochemistry and Petrogenesis of Tertiary Volcanic Rocks of the Eastern Roodbar, Alborz Mountain, North of Iran. Open Journal of Geology, 6, 1296-1311. doi: 10.4236-ojg.2016.610095.





Author: Zahra Shafeie1, Mohammad Ali Arian1*, Shahrouz Haghnazar2, Mansour Vossoughi Abedini3

Source: http://www.scirp.org/



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